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Finding the Fourth Proportional to 7,912.21, 11,868.21 and 2,365.60

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Solution

The fourth proportional to 7,912.21, 11,868.21 and 2,365.60 is: 3,548.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,912.21 : 11,868.21 = 2,365.60 : x
  2. Step 2: Convert to fraction form
    7,912.21/11,868.21 = 2,365.60/x
  3. Step 3: Cross multiply
    7,912.21x = 11,868.21 × 2,365.60
  4. Step 4: Simplify right side
    7,912.21x = 28,075,437.58
  5. Step 5: Solve for x
    x = 28,075,437.58/7,912.21
  6. Step 6: Final answer
    x = 3,548.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.